Income Taxes - Reconciliation of Change in Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
Feb. 28, 2018	Feb. 28, 2017
Income Tax Disclosure [Abstract]
Beginning Balance	$ 249	$ 225
Additions based on tax positions	(25)	99
Reductions due to lapses of statues of limitations	(83)	(75)
Ending Balance	$ 141	$ 249

Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)(4)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319

Name:	us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration